Refrigerator storage bin



FIG. 1 is a front perspective view of a refrigerator storage bin according to our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line representations in the figures do not limit the claimed design. 

The ornamental design for a refrigerator storage bin, as shown and described. 